The U.S. Navy program to improve the reliability and seaworthiness of its Hovercrafts is moving forward. As first reported by Design News, Navy engineers are changing the technology used to attach the rubber-pleated skirts that contain high-pressure air that moves the craft above water. Newly developed fasteners can be replaced with regular tools, speeding replacement of damaged skirts. The new TineLok system has one or more tines that work in conjunction with longitudinal bolt thread channels to prevent counter rotation and loosening. The skirt manufacturer, Avon Rubber, has sent a purchase order for the first Navy Hovercraft replacement program. Orders to cover the rest of the fleet are expected to begin in May. There are 100 skirts on each Hovercraft and maintenance costs will be cut 25 to 30 percent. The first fasteners are all stainless: the nut, the tine and bolt. Tests are also being conducted on plastic versions that cut weight by 75 percent. Nuts and bolts are made from PEEK and the tine is made from glass-reinforced nylon. Rod is being machined for the sample run. The Army is looking at the technology for some of its weapons systems. It may also have applications for fastening of lighting in various applications.
Listen to a podcast on the new Hovercraft fastening technology.
New versions of BASF's Ecovio line are both compostable and designed for either injection molding or thermoforming. These combinations are becoming more common for the single-use bioplastics used in food service and food packaging applications, but are still not widely available.
The 100-percent solar-powered Solar Impulse plane flies on a piloted, cross-country flight this summer over the US as a prelude to the longer, round-the-world flight by its successor aircraft planned for 2015.
GE Aviation expects to chop off about 25 percent of the total 3D printing time of metallic production components for its LEAP Turbofan engine, using in-process inspection. That's pretty amazing, considering how slow additive manufacturing (AM) build times usually are.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This radio show will show what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.